You should aslo consider some things before changing account sweetie. First, you number of pageviews (yeah, for some people, that metters) and second, the fact that you are known as the username you have now. If starting all over again doesn't bother you than go for it ! Make it more personnal !
But I think you're subcribed here. Maybe it'll be also wiser to wait until the end of the subcription or maybe you can transfer your subcription to your new account ?